Astec Industries (ASTE) 10-Q 6 May 21 2021 Q1 Quarterly report Financial data

Cover Page

Cover Page - shares	3 Months Ended
	Mar. 31, 2021	May 03, 2021
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2021
Document Transition Report	false
Entity File Number	001-11595
Entity Registrant Name	Astec Industries, Inc.
Entity Incorporation, State or Country Code	TN
Entity Tax Identification Number	62-0873631
Entity Address, Address Line One	1725 Shepherd Road
Entity Address, City or Town	Chattanooga
Entity Address, State or Province	TN
Entity Address, Postal Zip Code	37421
City Area Code	423
Local Phone Number	899-5898
Title of 12(b) Security	Common Stock
Trading Symbol	ASTE
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		22,730,943
Entity Central Index Key	0000792987
Current Fiscal Year End Date	--12-31
Amendment Flag	false
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q1

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 164.6	$ 158.6
Investments	7	4.3
Trade receivables and contract assets, net of allowance for credit losses of $2.3 and $1.7, respectively	141.2	115.9
Other receivables	5	4.7
Inventories	244.2	249.7
Prepaid and refundable income taxes	8.3	8.8
Prepaid expenses and other assets	16.6	17.5
Assets held for sale	5.1	6.3
Total current assets	592	565.8
Property and equipment, net of accumulated depreciation of $240.5 and $237.6, respectively	169.6	172.8
Investments	12.6	13.7
Goodwill	38.9	38.7
Intangible assets, net of accumulated amortization of $30.9 and $31.3, respectively	29.1	31.2
Deferred income tax assets	14.5	15
Other long-term assets	11.6	11
Total assets	868.3	848.2
Current liabilities:
Current maturities of long-term debt	0.2	0.2
Short-term debt	1.2	1.4
Accounts payable	68.1	52.7
Customer deposits	33.3	34.2
Accrued product warranty	10.9	10.3
Accrued payroll and related liabilities	23.3	20.8
Accrued loss reserves	2.4	3
Other current liabilities	45.7	47.7
Total current liabilities	185.1	170.3
Long-term debt	0.3	0.4
Deferred income tax liabilities	0.4	0.5
Other long-term liabilities	35.5	34
Total liabilities	221.3	205.2
Commitments and contingencies (Note 8)
Shareholders' equity:
Preferred stock - authorized 4,000,000 shares of $1.00 par value; none issued	0	0
Common stock – authorized 40,000,000 shares of $0.20 par value; issued and outstanding – 22,715,517 as of March 31, 2021 and 22,611,976 as of December 31, 2020	4.5	4.5
Additional paid-in capital	126.3	127.8
Accumulated other comprehensive loss	(34.2)	(33.5)
Company stock held by SERP, at cost	(1.4)	(1.5)
Retained earnings	551.4	545.2
Shareholders’ equity	646.6	642.5
Noncontrolling interest	0.4	0.5
Total equity	647	643
Total liabilities and equity	$ 868.3	$ 848.2

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020
Statement of Financial Position [Abstract]
Allowance for credit loss	$ 2.3	$ 1.7
Accumulated depreciation	240.5	237.6
Accumulated amortization	$ 30.9	$ 31.3
Preferred stock, shares authorized (in shares)	4,000,000	4,000,000
Preferred stock, par value (in dollars per share)	$ 1	$ 1
Preferred stock, shares issued (in shares)	0	0
Common stock, shares authorized (in shares)	40,000,000	40,000,000
Common stock, par value (in dollars per share)	$ 0.20	$ 0.20
Common stock, shares issued (in shares)	22,715,517	22,611,976
Common stock, shares outstanding (in shares)	22,715,517	22,611,976

Consolidated Statements of Oper

Consolidated Statements of Operations - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Income Statement [Abstract]
Net sales	$ 284.4	$ 288.8
Cost of sales	215.9	215.4
Gross profit	68.5	73.4
Selling, general and administrative expenses	51.7	49.7
Research and development expenses	6.3	6.5
Restructuring, impairment and other asset charges, net	0.7	2.1
Income from operations	9.8	15.1
Other income:
Interest expense	(0.2)	0
Interest income	0.1	0.2
Other expense	(0.1)	0
Income from operations before income taxes	9.6	15.3
Income tax provision (benefit)	0.9	(5.1)
Net income	8.7	20.4
Net loss attributable to noncontrolling interest	0	0.2
Net income attributable to controlling interest	$ 8.7	$ 20.6
Per share data:
Earnings per share - Basic (in dollars per share)	$ 0.38	$ 0.91
Earnings per share - Diluted (in dollars per share)	$ 0.38	$ 0.91
Weighted average shares outstanding - Basic	22,633,457	22,544,999
Weighted average shares outstanding - Diluted	22,874,810	22,713,136

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Statement of Comprehensive Income [Abstract]
Net income	$ 8.7	$ 20.4
Other comprehensive loss:
Foreign currency translation adjustments	(0.8)	(9.2)
Other comprehensive loss	(0.8)	(9.2)
Comprehensive income	7.9	11.2
Comprehensive (income) loss attributable to noncontrolling interest	(0.1)	0.2
Comprehensive income attributable to controlling interest	$ 7.8	$ 11.4

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Cash flows from operating activities:
Net income	$ 8.7	$ 20.4
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	5	5.2
Amortization	2.6	1.1
Provision for credit losses	0.3	0.6
Provision for warranties	2.7	2.7
Deferred compensation expense (benefit)	0.7	(0.3)
Share-based compensation	1.4	1.1
Deferred tax provision	0.8	13.5
Gain on disposition of property and equipment	(0.1)	(0.6)
Asset impairment charges	0	1.6
Distributions to SERP participants	(0.3)	(0.1)
Change in operating assets and liabilities, excluding the effects of acquisitions:
Purchase of trading securities, net	(1.4)	(0.4)
Receivables and other contract assets	(26.4)	(16.6)
Inventories	5	(0.3)
Prepaid expenses	0.7	3.3
Other assets	(1.2)	(0.8)
Accounts payable	15.8	7.8
Accrued loss reserves	0.1	0
Accrued payroll and related expenses	2.6	(4.6)
Other accrued liabilities	(0.3)	(0.7)
Accrued product warranty	(2.1)	(2.1)
Customer deposits	(0.9)	(5.2)
Income taxes payable/prepaid	0.9	(18.5)
Other	0	(1.7)
Net cash provided by operating activities	14.6	5.4
Cash flows from investing activities:
Acquisitions, net of cash acquired	0.1	0
Overpayment returned on prior sale of subsidiary	(1.1)	0
Expenditures for property and equipment	(3.3)	(5.8)
Proceeds from sale of property and equipment	1.4	1.9
Purchase of investments, net	(0.1)	(0.2)
Net cash used by investing activities	(3)	(4.1)
Cash flows from financing activities:
Payment of dividends	(2.5)	(2.5)
Borrowings under bank loans	2	0
Repayment of bank loans	(2.3)	(0.7)
Sale of Company stock by SERP, net	0.2	0
Withholding tax paid upon vesting of share-based compensation awards	(3)	(0.5)
Net cash used by financing activities	(5.6)	(3.7)
Effect of exchange rates on cash	0	(2.6)
Increase (decrease) in cash and cash equivalents	6	(5)
Cash and cash equivalents, beginning of period	158.6	48.9
Cash and cash equivalents, end of period	164.6	43.9
Cash paid during the year for:
Interest, net of capitalized interest	0.1	0.1
Income taxes paid	0.2	0
Supplemental disclosures of non-cash items
Capital expenditures in accounts payable	0.2	1.1
Additions to right-of-use assets and lease liabilities	0.5	0.4
Liability award converted to equity	$ 0	$ 0.8

Consolidated Statements of Equi

Consolidated Statements of Equity - USD ($) $ in Millions	Total	Common Stock	Additional Paid-in- Capital	Accumulated Other Comprehensive Loss	Company Shares Held by SERP	Retained Earnings	Non-controlling Interest
Balance at Dec. 31, 2019	$ 602.4	$ 4.5	$ 122.6	$ (31.8)	$ (1.7)	$ 508.3	$ 0.5
Balance (in shares) at Dec. 31, 2019		22,551,183
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	20.4					20.6	(0.2)
Other comprehensive loss	(9.2)			(9.2)
Dividends declared and paid	(2.5)					(2.5)
Share-based compensation	1.1		1.1
Conversion of liability awards to equity	0.8		0.8
Issuance of common stock under incentive plan (in shares)		32,663
Withholding tax paid upon equity award vesting	(0.5)		(0.5)
Balance at Mar. 31, 2020	612.5	$ 4.5	124	(41)	(1.7)	526.4	0.3
Balance (in shares) at Mar. 31, 2020		22,583,846
Balance at Dec. 31, 2020	$ 643	$ 4.5	127.8	(33.5)	(1.5)	545.2	0.5
Balance (in shares) at Dec. 31, 2020	22,611,976	22,611,976
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 8.7					8.7
Other comprehensive loss	(0.8)			(0.7)			(0.1)
Dividends declared and paid	(2.5)					(2.5)
Share-based compensation	1.4		1.4
Issuance of common stock under incentive plan (in shares)		103,541
Withholding tax paid upon equity award vesting	(3)		(3)
SERP transactions, net	0.2		0.1		0.1
Balance at Mar. 31, 2021	$ 647	$ 4.5	$ 126.3	$ (34.2)	$ (1.4)	$ 551.4	$ 0.4
Balance (in shares) at Mar. 31, 2021	22,715,517	22,715,517

Consolidated Statements of Eq_2

Consolidated Statements of Equity (Parenthetical) - $ / shares	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Statement of Stockholders' Equity [Abstract]
Dividends declared per common share (in dollars per share)	$ 0.11	$ 0.11

Basis of Presentation and Signi

Basis of Presentation and Significant Accounting Policies	3 Months Ended
	Mar. 31, 2021
Accounting Policies [Abstract]
Basis of Presentation and Significant Accounting Policies	Basis of Presentation and Significant Accounting Policies Description of Business Astec Industries, Inc. ("Astec" or the "Company") is a Tennessee corporation which was incorporated in 1972. The Company designs, engineers, manufactures and markets equipment and components used primarily in road building and related construction activities, as well as other products discussed below. The Company's products are used in each phase of road building, from quarrying and crushing the aggregate to application of the road surface. The Company also manufactures certain equipment and components unrelated to road construction, including equipment for the mining, quarrying, construction and demolition industries and port and rail yard operators; industrial heat transfer equipment; commercial whole-tree pulpwood chippers; horizontal grinders; blower trucks; concrete plants; commercial and industrial burners; and combustion control systems. The Company operates in two reportable segments (plus Corporate) - Infrastructure Solutions and Materials Solutions. The Company's two reportable business segments comprise sites based upon the nature of the products or services produced, the type of customer for the products, the similarity of economic characteristics, the manner in which management reviews results and the nature of the production process, among other considerations. The Corporate category consists primarily of the parent company and Astec Insurance Company ("Astec Insurance" or the "captive"), a captive insurance company, which do not meet the requirements for separate disclosure as an operating segment or inclusion in one of the other reporting segments. Management evaluates performance and allocates resources to the operating segments based on profit or loss from operations before United States ("U.S.") federal income taxes, state deferred taxes and corporate overhead and, thus, these costs are included in the Corporate category. Basis of Presentation The accompanying unaudited consolidated financial statements include the accounts of Astec and its subsidiaries and have been prepared by the Company, pursuant to the rules and regulations of the U.S. Securities and Exchange Commission ("SEC"). The Company prepares its financial statements in accordance with accounting principles generally accepted in the U.S. ("U.S. GAAP"). Certain information and footnote disclosures normally included in annual consolidated financial statements prepared in accordance with U.S. GAAP have been condensed or omitted pursuant to the SEC rules and regulations governing interim financial statements. However, the Company believes that the disclosures made in the unaudited consolidated financial statements and related notes are adequate to make the information presented not misleading. These consolidated financial statements should be read in conjunction with the Company's audited consolidated financial statements and notes thereto included in the Company's Annual Report on Form 10-K for the year ended December 31, 2020. All intercompany balances and transactions between the Company and its affiliates have been eliminated in consolidation. The preparation of consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the reporting periods. Significant items subject to such estimates and assumptions include inventory obsolescence costs, warranty costs, inventory net realizable value, self-insurance loss reserves, employee benefit programs and the measurement of income tax assets and liabilities. The Company bases its estimates on historical experience and on various other assumptions that the Company believes to be reasonable under the circumstances. The COVID-19 pandemic has resulted in uncertainties in the Company’s business, which may result in actual results differing from those estimates. As a result, our accounting estimates and assumptions may change over time in response to COVID-19. Such changes could result in future impairments of goodwill, intangibles, long-lived assets and investment securities and incremental credit losses on receivables, among other issues. On an ongoing basis, the Company evaluates these assumptions, judgments and estimates. Actual results may differ from these estimates. In the opinion of management, the consolidated financial statements contain all adjustments necessary for a fair statement of the results of operations and comprehensive income (loss) for the three months ended March 31, 2021 and 2020, the financial position as of March 31, 2021 and December 31, 2020 and the cash flows for the three months ended March 31, 2021 and 2020, and except as otherwise discussed herein, such adjustments consist only of those of a normal recurring nature. The interim results are not necessarily indicative of results that may be achieved in a full reporting year. All dollar amounts, except share and per share amounts, are in millions of dollars unless otherwise indicated. Reclassifications and Adjustments Certain reclassifications in amounts previously reported have been made to conform to current presentation including the reclassification of $0.6 million net gain on sale of fixed assets from "Cost of sales" to "Restructuring, impairment and other asset charges, net" for the three months ended March 31, 2020. In addition, the Company recorded a $1.5 million out-of-period expense during the first quarter of 2021 in "Selling, general and administrative expenses" for certain vendor hosted software licensing fees for contract costs incurred in the fourth quarter of 2020. Recently Adopted Accounting Pronouncements In December 2019, the Financial Accounting Standards Board issued Accounting Standards Update 2019-12, "Income Taxes (Topic 740), Simplifying the Accounting for Income Taxes", which eliminates certain exceptions related to the approach for intra-period tax allocation, the methodology for calculating income taxes in an interim period and the recognition of deferred tax liabilities for outside basis differences. The new guidance also simplifies aspects of the accounting for franchise taxes and enacted changes in tax laws or rates and clarifies the accounting for transactions that result in a step-up in the tax basis of goodwill. The Company adopted this new standard effective January 1, 2021. The adoption of this standard had an immaterial impact on the Company's financial position, results of operations or cash flows. Recent accounting guidance not discussed above is not applicable, did not have, or is not expected to have a material impact on the Company.

Acquisitions

Acquisitions	3 Months Ended
	Mar. 31, 2021
Business Combinations [Abstract]
Acquisitions	Acquisitions CON-E-CO Acquisition - The Company entered into a Stock Purchase Agreement, dated as of July 20, 2020, by and between Oshkosh Corporation for the purchase of the CON-E-CO concrete equipment company in Nebraska. The purchase price was $13.8 million, after adjustments, and was paid in cash. The Company's preliminary allocation of the purchase price, net of the working capital adjustment in the first quarter of 2021 discussed below, resulted in the recognition of $4.3 million of intangible assets primarily consisting of customer relationships (8 year life) and trade name (3 year life). Significant inputs and assumptions used in determining the fair values of these intangible assets include management's forecasts of future revenues, earnings and cash flows, a discount rate based on the median weighted average cost of capital of the Company and select market competitors, and proportion of intangible assets acquired in relation to tangible assets. The acquisition provides the Company with a broader line of concrete batch plant manufacturing, which will strengthen the Infrastructure Solutions segment. Results of operations have been consolidated from the date of acquisition. The fair value of the net assets acquired were based on a preliminary valuation and the estimates are subject to change within the measurement period. In the first quarter of 2021, the Company recorded a $0.4 million adjustment related to a refined valuation of deferred tax liabilities, which was offset in intangible assets. The following table summarizes the preliminary allocations of the total purchase price, net of the working capital adjustment: (in millions) Amount Accounts receivable $ 2.3 Inventories 8.1 Other assets 6.6 Intangible assets 4.3 Total assets acquired $ 21.3 Accounts payable and other (4.7) Advance customer deposits (2.8) Total liabilities assumed (7.5) Total purchase price $ 13.8 BMH Systems Acquisition - The Company entered into a Share Purchase Agreement, dated as of August 3, 2020, by and between BMH Systems Corporation ("St. Bruno") for the purchase of the concrete equipment company in Quebec, Canada. The purchase price was $15.6 million, after adjustments, and was paid in cash. The Company's preliminary allocation of the purchase price resulted in the recognition of $6.3 million of goodwill and $5.7 million of other intangible assets primarily consisting of customer relationships (9 year life) and of trade name (15 year life). Significant inputs and assumptions used in determining the fair values of these intangible assets include management's forecasts of future revenues, earnings and cash flows, a discount rate based on the median weighted average cost of capital of the Company and select market competitors, and proportion of intangible assets acquired in relation to tangible assets. The acquisition provides the Company with a broader line of concrete batch plant manufacturing, which will strengthen the Infrastructure Solutions segment. Results of operations have been consolidated from the date of acquisition. The goodwill is not expected to be deductible for income tax purposes. The fair value of the net assets acquired were based on a preliminary valuation and the estimates are subject to change within the measurement period. In the first quarter of 2021, a working capital adjustment was made that resulted in the decrease of goodwill of $0.1 million. The following table summarizes the preliminary allocations of the total purchase price, net of the working capital adjustment: (in millions) Amount Cash $ 1.2 Accounts receivable and contract assets 6.4 Inventories 2.0 Goodwill 6.3 Other assets 3.8 Intangible assets 5.7 Total assets acquired $ 25.4 Total liabilities assumed (9.8) Total purchase price $ 15.6 Proforma financial information is not included since not significant.

Inventories

Inventories	3 Months Ended
	Mar. 31, 2021
Inventory Disclosure [Abstract]
Inventories	Inventories Inventories are valued at the lower of cost (first-in, first-out) or net realizable value, which requires the Company to make specific estimates, assumptions and judgments in determining the amount, if any, of reductions in the valuation of inventories to their net realizable values. Inventories consist of the following: (in millions) March 31, 2021 December 31, 2020 Raw materials and parts $ 160.0 $ 154.6 Work-in-process 54.6 57.3 Finished goods 26.8 34.0 Used equipment 2.8 3.8 Total $ 244.2 $ 249.7

Fair Value Measurements

Fair Value Measurements	3 Months Ended
	Mar. 31, 2021
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair Value Measurements The Company has various financial instruments that must be measured at fair value on a recurring basis, including marketable debt and equity securities held by Astec Insurance and marketable equity securities held in a non-qualified Supplemental Executive Retirement Plan ("SERP"). Although the SERP investments are allocated to individual participants and investment decisions are made solely by those participants, the SERP is a non-qualified plan. Consequently, the Company owns the assets and the related offsetting liability for disbursement until such time as a participant makes a qualifying withdrawal, which is recorded in "Other long-term liabilities" in the Consolidated Balance Sheets. The Company's subsidiaries also occasionally enter into foreign currency exchange contracts to mitigate exposure to fluctuations in currency exchange rates. The carrying amount of cash and cash equivalents, trade receivables and contract assets, other receivables, accounts payable, short-term debt and long-term debt approximates their fair value because of their short-term nature and/or interest rates associated with the instruments. Investments are carried at their fair value based on quoted market prices for identical or similar assets or, where no quoted prices exist, other observable inputs for the asset. The fair values of foreign currency exchange contracts are based on quotations from various banks for similar instruments using models with market based inputs. Financial assets and liabilities are categorized based upon the level of judgment associated with the inputs used to measure their fair value. The inputs used to measure the fair value are identified in the following hierarchy: Level 1 - Unadjusted quoted prices in active markets for identical assets or liabilities. Level 2 - Unadjusted quoted prices in active markets for similar assets or liabilities; or unadjusted quoted prices for identical or similar assets or liabilities in markets that are not active; or inputs other than quoted prices that are observable for the asset or liability. Level 3 - Inputs reflect management's best estimate of what market participants would use in pricing the asset or liability at the measurement date. Consideration is given to the risk inherent in the valuation technique and the risk inherent in the inputs to the model. As indicated in the tables below, the Company has determined that all of its financial assets and liabilities as of March 31, 2021 and December 31, 2020 are Level 1 and Level 2 in the fair value hierarchy as defined above: March 31, 2021 (in millions) Level 1 Level 2 Total Financial assets: Trading equity securities: SERP money market fund $ 0.2 $ — $ 0.2 SERP mutual funds 5.1 — 5.1 Preferred stocks 0.3 — 0.3 Equity funds 3.8 — 3.8 Trading debt securities: Corporate bonds 4.0 — 4.0 Municipal bonds — 0.6 0.6 Floating rate notes 0.4 — 0.4 U.S. government securities 1.8 — 1.8 Asset-backed securities — 1.8 1.8 Other 0.7 0.9 1.6 Total financial assets $ 16.3 $ 3.3 $ 19.6 Financial liabilities: Derivative financial instruments $ — $ 0.2 $ 0.2 SERP liabilities — 8.1 8.1 Total financial liabilities $ — $ 8.3 $ 8.3 December 31, 2020 (in millions) Level 1 Level 2 Total Financial assets: Trading equity securities: SERP money market fund $ 0.2 $ — $ 0.2 SERP mutual funds 4.8 — 4.8 Preferred stocks 0.3 — 0.3 Equity funds 1.7 — 1.7 Trading debt securities: Corporate bonds 4.8 — 4.8 Municipal bonds — 0.9 0.9 Floating rate notes 0.4 — 0.4 U.S. government securities 1.8 — 1.8 Asset-backed securities — 2.1 2.1 Other — 1.0 1.0 Derivative financial instruments — 0.1 0.1 Total financial assets $ 14.0 $ 4.1 $ 18.1 Financial liabilities: Derivative financial instruments $ — $ 0.5 $ 0.5 SERP liabilities — 7.3 7.3 Total financial liabilities $ — $ 7.8 $ 7.8

Product Warranty Reserves

Product Warranty Reserves	3 Months Ended
	Mar. 31, 2021
Product Warranties Disclosures [Abstract]
Product Warranty Reserves	Product Warranty Reserves The Company warrants its products against manufacturing defects and performance to specified standards. The warranty period and performance standards vary by market and uses of its products, but generally range from three months to two years or up to a specified number of hours of operation. The Company estimates the costs that may be incurred under its warranties and records a liability at the time product sales are recorded. The product warranty liability is primarily based on historical claim rates, nature of claims and the associated cost. Changes in the Company's product warranty liability for the three month periods ended March 31, 2021 and 2020 are as follows: Three Months Ended March 31, (in millions) 2021 2020 Reserve balance, beginning of the period $ 10.3 $ 10.3 Warranty liabilities accrued 2.7 2.7 Warranty liabilities settled (2.1) (2.1) Other — (0.2) Reserve balance, end of the period $ 10.9 $ 10.7

Accrued Loss Reserves

Accrued Loss Reserves	3 Months Ended
	Mar. 31, 2021
Accrued Loss Reserves [Abstract]
Accrued Loss Reserves	Accrued Loss ReservesThe Company records reserves for losses related to known workers' compensation and general liability claims that have been incurred but not yet paid or are estimated to have been incurred but not yet reported to the Company. The undiscounted reserves are actuarially determined based on the Company's evaluation of the type and severity of individual claims and historical information, primarily its own claims experience, along with assumptions about future events. Changes in assumptions, as well as changes in actual experience, could cause these estimates to change in the future. Total accrued loss reserves were $7.3 million and $7.2 million as of March 31, 2021 and December 31, 2020, respectively, of which $4.9 million and $4.2 million were included in "Other long-term liabilities" in the Consolidated Balance Sheets at March 31, 2021 and December 31, 2020, respectively.

Income Taxes

Income Taxes	3 Months Ended
	Mar. 31, 2021
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The Company's effective income tax rates were 9.4% and (33.3)% for the three month periods ended March 31, 2021 and 2020, respectively. The Company's effective tax rate for the three months ended March 31, 2021 includes the effect of state income taxes, a benefit for federal and state research and development credits, a net benefit for international provisions of U.S. tax reform, and a net discrete benefit from the vesting of employee stock options. The Company's effective tax rate for the three months ended March 31, 2020 includes the effect of state income taxes, a benefit for federal and state research and development credits, a net benefit for international provisions of U.S. tax reform, and various discrete items. Additionally, the tax provision for the three months ended March 31, 2020 includes a net discrete tax benefit resulting from provisions of the Coronavirus Aid, Relief and Economic Security ("CARES") Act enacted on March 27, 2020. Among other provisions, the CARES Act modified the net operating loss ("NOL") carryback provisions, which allowed the Company to carryback its 2018 NOL to prior tax years. This carryback to tax years with a higher statutory rate (35)% resulted in a net discrete tax benefit of $9.5 million in the first quarter of 2020.

Commitments and Contingencies

Commitments and Contingencies	3 Months Ended
	Mar. 31, 2021
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Certain customers have financed purchases of Company products through arrangements with third-party financing institutions in which the Company is contingently liable for customer debt of $2.6 million and $2.9 million at March 31, 2021 and December 31, 2020, respectively. These arrangements expire at various dates through December 2023. Additionally, the Company is also potentially liable for 1.75% of the unpaid balance, determined as of December 31 of the prior year (or approximately $0.4 million for 2021), on certain past customer equipment purchases that were financed by an outside finance company. The agreements provide that the Company will receive the lender's full security interest in the equipment financed if the Company is required to fulfill its contingent liability under these arrangements. The Company has recorded a liability of $1.5 million and $2.0 million related to these guarantees as of March 31, 2021 and December 31, 2020, respectively. The Company reviews off-balance sheet guarantees individually and at the loss pool level based on one agreement. Prior history is considered in regard to the Company having to perform on any off-balance sheet guarantees, as well as future projections of individual customer credit worthiness including consideration of the implications of COVID-19 in regard to assessing credit losses related to off-balance sheet guarantees. In addition, the Company is contingently liable under letters of credit issued under its $150.0 million revolving credit facility (the "Credit Facility") totaling $5.5 million as of March 31, 2021, including $1.6 million of letters of credit guaranteeing certain credit facilities of the Company's Brazilian subsidiary. The outstanding letters of credit expire at various dates through June 2023. The maximum potential amount of future payments under letters of credit issued under the Credit Facility for which the Company could be liable is $30.0 million as of March 31, 2021. As of March 31, 2021, the Company's foreign subsidiaries are contingently liable for a total of $3.7 million in letters of credit and bank guarantees securing performance and advance payments. The maximum potential amount of future payments under these letters of credit and bank guarantees for which the Company could be liable is $8.9 million as of March 31, 2021. The Company's GEFCO subsidiary has been named a defendant in a lawsuit originally filed on August 16, 2018 with an amended complaint filed on January 25, 2019, in the United States District Court for the Western District of Oklahoma. The action is styled VenVer S.A. and Americas Coil Tubing LLP v. GEFCO, Inc., Case No. CIV-18-790-SLP. The complaint alleges breaches of warranty and other similar claims regarding equipment sold by GEFCO in 2013. In addition to seeking a rescission of the purchase contract, the plaintiff is seeking special and consequential damages. The original purchase price of the equipment was approximately $8.5 million. GEFCO disputes the plaintiff's allegations and intends to defend this lawsuit vigorously. On July 7, 2020, the plaintiffs filed a separate lawsuit directly against Astec Industries, Inc. Besides a new claim based on fraudulent transfer, the allegations essentially mirror the GEFCO suit. Astec Industries, Inc. is vigorously defending this suit as well. The Company is unable to determine whether or not a future loss will be incurred due to this litigation or estimate the possible loss or range of loss, if any, at this time. The Company is currently a party to various claims and legal proceedings that have arisen in the ordinary course of business. If management believes that a loss arising from such claims and legal proceedings is probable and can reasonably be estimated, the Company records the amount of the loss (excluding estimated legal fees) or the minimum estimated liability when the loss is estimated using a range and no point within the range is more probable than another. As management becomes aware of additional information concerning such contingencies, any potential liability related to these matters is assessed and the estimates are revised, if necessary. If management believes that a loss arising from such claims and legal proceedings is either (i) probable but cannot be reasonably estimated or (ii) reasonably estimable but not probable, the Company does not record the amount of the loss, but does make specific disclosure of such matter. Based upon currently available information and with the advice of counsel, management believes that the ultimate outcome of its current claims and legal proceedings, individually and in the aggregate, will not have a material adverse effect on the Company's financial position, cash flows or results of operations. However, claims and legal proceedings are subject to inherent uncertainties and rulings unfavorable to the Company could occur. If an unfavorable ruling were to occur, there exists the possibility of a material adverse effect on the Company's financial position, cash flows or results of operations.

Share-Based Compensation

Share-Based Compensation	3 Months Ended
	Mar. 31, 2021
Stockholders' Equity Note [Abstract]
Share-Based Compensation	Share-Based Compensation Prior to its expiration on February 25, 2021, the Company's 2011 Incentive Plan ("2011 Plan") provided for the grant of share-based awards to its employees, officers, directors and consultants. The 2011 Plan authorized the grant of options, share appreciation rights, restricted stock, restricted stock units, deferred stock units, performance awards, dividend equivalents and other share-based and cash awards. Under the 2011 Plan, the Company has outstanding restricted stock units, performance stock units and deferred stock units none of which participate in Company-paid dividends. On April 27, 2021 ("Plan Effective Date"), the Company's shareholders approved the 2021 Equity Incentive Plan ("2021 Plan"), which provides for a total of 1,280,000 shares to be reserved and available for issuance pursuant to the grant of new awards under the 2021 Plan, less one share for every one share subject to an award granted under the 2011 Plan after December 31, 2020 and prior to the Plan Effective Date. No new awards were granted between December 31, 2020 and the Plan Effective Date. The 2021 Plan authorizes the grant of options, share appreciation rights, restricted stock, restricted stock units, deferred stock units, performance awards, dividend equivalents and other share-based and cash awards. In addition, the 2021 Plan allows for participants to elect to receive vested units on a deferred basis. Awards granted under the 2021 Plan are entitled to dividend equivalents, which are subject to the same forfeiture and transfer restrictions and deferral terms as apply to the award to which they relate. The Company's annual grants of restricted stock units and performance stock units typically awarded in the first quarter of the year were delayed until April 2021 following the shareholder approval of the 2021 Plan. Each of the above incentive plans are administered by the Company's Compensation Committee of the Board of Directors.

Revenue Recognition

Revenue Recognition	3 Months Ended
	Mar. 31, 2021
Revenue from Contract with Customer [Abstract]
Revenue Recognition	Revenue Recognition The following tables disaggregate the Company's revenue by major source for the three month periods ended March 31, 2021 and 2020 (excluding intercompany sales): Three Months Ended March 31, 2021 (in millions) Infrastructure Materials Total Net Sales-Domestic: Equipment sales $ 99.2 $ 41.8 $ 141.0 Parts and component sales 51.9 17.7 69.6 Service and equipment installation revenue 5.8 0.1 5.9 Used equipment sales 2.9 — 2.9 Freight revenue 5.6 1.5 7.1 Other (0.4) (0.5) (0.9) Total domestic revenue 165.0 60.6 225.6 Net Sales-International: Equipment sales 21.3 12.8 34.1 Parts and component sales 13.1 7.7 20.8 Service and equipment installation revenue 1.0 0.5 1.5 Used equipment sales 0.1 0.8 0.9 Freight revenue 0.8 0.3 1.1 Other 0.2 0.2 0.4 Total international revenue 36.5 22.3 58.8 Total net sales $ 201.5 $ 82.9 $ 284.4 Three Months Ended March 31, 2020 (in millions) Infrastructure Materials Total Net Sales-Domestic: Equipment sales $ 100.4 $ 41.3 $ 141.7 Parts and component sales 52.6 18.5 71.1 Service and equipment installation revenue 6.8 0.4 7.2 Used equipment sales 7.2 — 7.2 Freight revenue 6.0 1.3 7.3 Other (0.2) (0.5) (0.7) Total domestic revenue 172.8 61.0 233.8 Net Sales-International: Equipment sales 19.4 14.4 33.8 Parts and component sales 8.3 9.3 17.6 Service and equipment installation revenue 0.9 0.2 1.1 Used equipment sales 0.6 0.8 1.4 Freight revenue 0.6 0.3 0.9 Other — 0.2 0.2 Total international revenue 29.8 25.2 55.0 Total net sales $ 202.6 $ 86.2 $ 288.8 Sales into major geographic regions were as follows: Three Months Ended March 31, (in millions) 2021 2020 United States $ 225.6 $ 233.8 Canada 17.3 14.7 Europe 10.5 9.4 Australia 8.8 5.8 Africa 8.3 6.6 South America 4.5 4.1 Brazil 4.2 4.7 Other 5.2 9.7 Total foreign 58.8 55.0 Total net sales $ 284.4 $ 288.8 As of March 31, 2021, the Company had contract assets of $4.3 million and contract liabilities of $8.3 million, including $2.7 million of deferred revenue related to extended warranties. As of December 31, 2020, the Company had contract assets of $4.3 million and contract liabilities of $8.9 million, including $2.9 million of deferred revenue related to extended warranties.

Segment Information

Segment Information	3 Months Ended
	Mar. 31, 2021
Segment Reporting [Abstract]
Segment Information	Segment Information The Company has two reportable segments, each of which comprise sites based upon the nature of the products or services produced, the type of customer for the products, the similarity of economic characteristics, the manner in which management reviews results and the nature of the production process, among other considerations. A brief description of each segment is as follows: Infrastructure Solutions – The Infrastructure Solutions segment comprises 15 sites and designs, engineers, manufactures and markets a complete line of asphalt plants, concrete plants and their related components and ancillary equipment as well as supplying other heavy equipment. The U.S. based sites within the Infrastructure Solutions segment are primarily manufacturing operations while those located internationally market, service and install equipment and provide parts in the regions in which they operate for many of the products produced by all of the Company's manufacturing sites. The primary purchasers of the products produced by this segment are asphalt producers, highway and heavy equipment contractors, ready mix concrete producers, contractors in the construction and demolition recycling markets and domestic and foreign governmental agencies. Materials Solutions – The Materials Solutions segment comprises 10 sites and designs and manufactures heavy processing equipment, in addition to servicing and supplying parts for the aggregate, metallic mining, recycling, ports and bulk handling markets. The sites within the Materials Solutions segment are primarily manufacturing operations with the AME and India sites functioning to market, service and install equipment and provide parts in the regions in which they operate for many of the products produced by all of the Company's manufacturing sites. Additionally, the Materials Solutions segment offers consulting and engineering services to provide complete "turnkey" processing systems. The principal purchasers of aggregate processing equipment include distributors, highway and heavy equipment contractors, sand and gravel producers, recycle and crushing contractors, open mine operators, quarry operators, port and inland terminal authorities, power stations and foreign and domestic governmental agencies. Corporate – The Corporate category consists primarily of the parent company and the Company's captive insurance company, Astec Insurance, which do not meet the requirements for separate disclosure as an operating segment or inclusion in one of the other reporting segments. The parent company and the captive insurance company provide support and corporate oversight for all of the sites. The Company evaluates performance and allocates resources to its operating segments based on profit or loss from operations before U.S. federal income taxes, state deferred taxes and corporate overhead and thus these costs are included in the Corporate category. The accounting policies of the reportable segments are the same as those described in the summary of significant accounting policies. Intersegment sales and transfers between foreign subsidiaries are valued at prices comparable to those for unrelated parties. Segment Information: Three Months Ended March 31, 2021 (in millions) Infrastructure Materials Corporate Total Revenues from external customers $ 201.5 $ 82.9 $ — $ 284.4 Intersegment sales 10.1 12.1 — 22.2 Segment profit (loss) 21.0 6.5 (18.8) 8.7 Three Months Ended March 31, 2020 (in millions) Infrastructure Materials Corporate Total Revenues from external customers $ 202.6 $ 86.2 $ — $ 288.8 Intersegment sales 5.9 8.3 — 14.2 Segment profit (loss) 17.2 6.0 (2.9) 20.3 A reconciliation of total segment profit to the Company's consolidated totals is as follows: Three Months Ended March 31, (in millions) 2021 2020 Net income attributable to controlling interest Total profit for reportable segments $ 27.5 $ 23.2 Corporate expenses, net (18.8) (2.9) Net loss attributable to noncontrolling interest — 0.2 Recapture of intersegment profit — 0.1 Total consolidated net income attributable to controlling interest $ 8.7 $ 20.6

Restructuring, Impairment and O

Restructuring, Impairment and Other Asset Charges, Net	3 Months Ended
	Mar. 31, 2021
Restructuring, Settlement and Impairment Provisions [Abstract]
Restructuring, Impairment and Other Charges, Net	Restructuring, Impairment and Other Asset Charges, NetBeginning in 2018, the Company made several strategic decisions to divest of underperforming manufacturing sites or product lines, including to close of certain of its subsidiaries, close and sell its manufacturing sites and relocate the product lines manufactured at each of these sites to other Company locations; exit the oil, gas and water well product lines; and sell certain assets. These actions generally include facility rationalization, asset impairment, workforce reduction and the associated costs of organizational integration activities. In addition, the Company periodically sells or disposes of its assets in the normal course of its business operations as they are no longer needed or used and may incur gains or losses on these disposals. Certain of the costs associated with these decisions are separately identified as restructuring. The Company reports asset impairment charges and gains or losses on the sales of property and equipment collectively, with restructuring charges in "Restructuring, impairment and other asset charges, net" in the Consolidated Statements of Operations. Restructuring and asset impairment charges are presented below: Three Months Ended March 31, (in millions) 2021 2020 Restructuring charges: Costs associated with closing Albuquerque $ — $ 0.3 Costs associated with closing Mequon 0.4 — Costs associated with closing Enid — 0.3 Costs associated with closing Tacoma 0.4 — Workforce reductions at multiple sites — 0.5 Total restructuring related charges 0.8 1.1 Asset impairment charges: Goodwill impairment charges — 1.6 Total asset impairment charges — 1.6 Gain on sale of property and equipment, net: Gain on sale of property and equipment, net (0.1) (0.6) Total gain of sales of property and equipment, net (0.1) (0.6) Restructuring, impairment and other asset charges, net $ 0.7 $ 2.1 Restructuring charges by segment are as follows: Three Months Ended March 31, (in millions) 2021 2020 Infrastructure Solutions $ 0.4 $ 1.1 Materials Solutions 0.4 — Total restructuring related charges $ 0.8 $ 1.1 Impairment charges by segment are as follows: Three Months Ended March 31, (in millions) 2021 2020 Infrastructure Solutions $ — $ 1.6 Total impairment charges $ — $ 1.6 The net gain on sale of property and equipment by segment are as follows: Three Months Ended March 31, (in millions) 2021 2020 Infrastructure Solutions $ (0.1) $ (0.6) Total gain on sale of property and equipment, net $ (0.1) $ (0.6) Restructuring charges accrued, but not paid, were $1.4 million and $1.1 million as of March 31, 2021 and December 31, 2020, respectively. On October 21, 2019, the Company announced the closing of its Albuquerque, New Mexico location. The decision to close the site was based in part on market conditions and manufacturing facilities underutilization. The marketing and manufacturing of products previously produced by the site were transferred to other Company facilities. The site was closed as of March 31, 2020. In late 2019, the oil and gas drilling product lines produced at the Enid, Oklahoma location were impaired and discontinued. The Company incurred $0.3 million in severance related costs in the first quarter of 2020 associated with exiting the oil and gas line of business at Enid. Enid's land and building assets totaling $5.1 million are included in "Assets held for sale" in the Consolidated Balance Sheets at December 31, 2020. The Company incurred $0.5 million of severance pay associated with workforce reductions at other of the Company's locations in the first quarter of 2020. During the three months ended March 31, 2020, the Company incurred $1.6 million of goodwill impairment charges due to a full impairment of goodwill associated with its mobile asphalt equipment operations included in the Infrastructure Solutions segment. In June 2020, the Company announced the closing of the Mequon site in order to simplify and consolidate operations. The Mequon facility ceased production operations in August 2020 and incurred $0.4 million of charges in the first quarter of 2021 primarily related to inventory relocation and integration activities. In October 2020, the Company closed a transaction for the sale of water well assets of the Company's Enid location, which included equipment, inventories and intangible assets. The purchase price for this transaction was approximately $6.9 million, net of purchase price adjustments completed in January 2021 whereby the Company has an obligation to pay the buyer $1.1 million. This obligation is included in "Other current liabilities" in the Consolidated Balance Sheets at December 31, 2020 and was settled in the first quarter of 2021. In January 2021, the Company announced plans to close the Tacoma facility in order to simplify and consolidate operations. The Tacoma facility is currently expected to cease operations in the fourth quarter of 2021. Manufacturing and marketing of Tacoma product lines are expected to be transferred to other facilities. In conjunction with this action, the Company recorded $0.4 million of restructuring related charges during the first quarter of 2021 primarily associated with severance and retention costs.

Earnings Per Common Share

Earnings Per Common Share	3 Months Ended
	Mar. 31, 2021
Earnings Per Share [Abstract]
Earnings Per Common Share	Earnings Per Common Share Basic earnings per common share is determined by dividing "Net income attributable to controlling interest" by the weighted average number of common shares outstanding during the reporting period. Diluted earnings per common share includes the dilutive effect of common stock equivalents consisting of restricted stock units, performance stock units and stock held in the Company's supplemental executive retirement plan, using the treasury stock method. Performance stock units, which are considered contingently issuable, are considered dilutive when the related performance criterion has been met. The following table sets forth a reconciliation of the number of shares used in the computation of basic and diluted earnings per common share: Three Months Ended March 31, 2021 2020 Denominator: Denominator for basic earnings per common share 22,633,457 22,544,999 Effect of dilutive securities 241,353 168,137 Denominator for diluted earnings per common share 22,874,810 22,713,136

Basis of Presentation and Sig_2

Basis of Presentation and Significant Accounting Policies (Policies)	3 Months Ended
	Mar. 31, 2021
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation The accompanying unaudited consolidated financial statements include the accounts of Astec and its subsidiaries and have been prepared by the Company, pursuant to the rules and regulations of the U.S. Securities and Exchange Commission ("SEC"). The Company prepares its financial statements in accordance with accounting principles generally accepted in the U.S. ("U.S. GAAP"). Certain information and footnote disclosures normally included in annual consolidated financial statements prepared in accordance with U.S. GAAP have been condensed or omitted pursuant to the SEC rules and regulations governing interim financial statements. However, the Company believes that the disclosures made in the unaudited consolidated financial statements and related notes are adequate to make the information presented not misleading. These consolidated financial statements should be read in conjunction with the Company's audited consolidated financial statements and notes thereto included in the Company's Annual Report on Form 10-K for the year ended December 31, 2020. All intercompany balances and transactions between the Company and its affiliates have been eliminated in consolidation. The preparation of consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the reporting periods. Significant items subject to such estimates and assumptions include inventory obsolescence costs, warranty costs, inventory net realizable value, self-insurance loss reserves, employee benefit programs and the measurement of income tax assets and liabilities. The Company bases its estimates on historical experience and on various other assumptions that the Company believes to be reasonable under the circumstances. The COVID-19 pandemic has resulted in uncertainties in the Company’s business, which may result in actual results differing from those estimates. As a result, our accounting estimates and assumptions may change over time in response to COVID-19. Such changes could result in future impairments of goodwill, intangibles, long-lived assets and investment securities and incremental credit losses on receivables, among other issues. On an ongoing basis, the Company evaluates these assumptions, judgments and estimates. Actual results may differ from these estimates. In the opinion of management, the consolidated financial statements contain all adjustments necessary for a fair statement of the results of operations and comprehensive income (loss) for the three months ended March 31, 2021 and 2020, the financial position as of March 31, 2021 and December 31, 2020 and the cash flows for the three months ended March 31, 2021 and 2020, and except as otherwise discussed herein, such adjustments consist only of those of a normal recurring nature. The interim results are not necessarily indicative of results that may be achieved in a full reporting year. All dollar amounts, except share and per share amounts, are in millions of dollars unless otherwise indicated. Reclassifications and Adjustments Certain reclassifications in amounts previously reported have been made to conform to current presentation including the reclassification of $0.6 million net gain on sale of fixed assets from "Cost of sales" to "Restructuring, impairment and other asset charges, net" for the three months ended March 31, 2020.
Recently Adopted Accounting Pronouncements	Recently Adopted Accounting Pronouncements In December 2019, the Financial Accounting Standards Board issued Accounting Standards Update 2019-12, "Income Taxes (Topic 740), Simplifying the Accounting for Income Taxes", which eliminates certain exceptions related to the approach for intra-period tax allocation, the methodology for calculating income taxes in an interim period and the recognition of deferred tax liabilities for outside basis differences. The new guidance also simplifies aspects of the accounting for franchise taxes and enacted changes in tax laws or rates and clarifies the accounting for transactions that result in a step-up in the tax basis of goodwill. The Company adopted this new standard effective January 1, 2021. The adoption of this standard had an immaterial impact on the Company's financial position, results of operations or cash flows. Recent accounting guidance not discussed above is not applicable, did not have, or is not expected to have a material impact on the Company.

Acquisitions (Tables)

Acquisitions (Tables)	3 Months Ended
	Mar. 31, 2021
Business Combinations [Abstract]
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed	The following table summarizes the preliminary allocations of the total purchase price, net of the working capital adjustment: (in millions) Amount Accounts receivable $ 2.3 Inventories 8.1 Other assets 6.6 Intangible assets 4.3 Total assets acquired $ 21.3 Accounts payable and other (4.7) Advance customer deposits (2.8) Total liabilities assumed (7.5) Total purchase price $ 13.8 (in millions) Amount Cash $ 1.2 Accounts receivable and contract assets 6.4 Inventories 2.0 Goodwill 6.3 Other assets 3.8 Intangible assets 5.7 Total assets acquired $ 25.4 Total liabilities assumed (9.8) Total purchase price $ 15.6

Inventories (Tables)

Inventories (Tables)	3 Months Ended
	Mar. 31, 2021
Inventory Disclosure [Abstract]
Schedule of Inventory, Current	Inventories consist of the following: (in millions) March 31, 2021 December 31, 2020 Raw materials and parts $ 160.0 $ 154.6 Work-in-process 54.6 57.3 Finished goods 26.8 34.0 Used equipment 2.8 3.8 Total $ 244.2 $ 249.7

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	3 Months Ended
	Mar. 31, 2021
Fair Value Disclosures [Abstract]
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis	March 31, 2021 (in millions) Level 1 Level 2 Total Financial assets: Trading equity securities: SERP money market fund $ 0.2 $ — $ 0.2 SERP mutual funds 5.1 — 5.1 Preferred stocks 0.3 — 0.3 Equity funds 3.8 — 3.8 Trading debt securities: Corporate bonds 4.0 — 4.0 Municipal bonds — 0.6 0.6 Floating rate notes 0.4 — 0.4 U.S. government securities 1.8 — 1.8 Asset-backed securities — 1.8 1.8 Other 0.7 0.9 1.6 Total financial assets $ 16.3 $ 3.3 $ 19.6 Financial liabilities: Derivative financial instruments $ — $ 0.2 $ 0.2 SERP liabilities — 8.1 8.1 Total financial liabilities $ — $ 8.3 $ 8.3 December 31, 2020 (in millions) Level 1 Level 2 Total Financial assets: Trading equity securities: SERP money market fund $ 0.2 $ — $ 0.2 SERP mutual funds 4.8 — 4.8 Preferred stocks 0.3 — 0.3 Equity funds 1.7 — 1.7 Trading debt securities: Corporate bonds 4.8 — 4.8 Municipal bonds — 0.9 0.9 Floating rate notes 0.4 — 0.4 U.S. government securities 1.8 — 1.8 Asset-backed securities — 2.1 2.1 Other — 1.0 1.0 Derivative financial instruments — 0.1 0.1 Total financial assets $ 14.0 $ 4.1 $ 18.1 Financial liabilities: Derivative financial instruments $ — $ 0.5 $ 0.5 SERP liabilities — 7.3 7.3 Total financial liabilities $ — $ 7.8 $ 7.8

Product Warranty Reserves (Tabl

Product Warranty Reserves (Tables)	3 Months Ended
	Mar. 31, 2021
Product Warranties Disclosures [Abstract]
Schedule of Product Warranty Liability	Changes in the Company's product warranty liability for the three month periods ended March 31, 2021 and 2020 are as follows: Three Months Ended March 31, (in millions) 2021 2020 Reserve balance, beginning of the period $ 10.3 $ 10.3 Warranty liabilities accrued 2.7 2.7 Warranty liabilities settled (2.1) (2.1) Other — (0.2) Reserve balance, end of the period $ 10.9 $ 10.7

Revenue Recognition (Tables)

Revenue Recognition (Tables)	3 Months Ended
	Mar. 31, 2021
Revenue from Contract with Customer [Abstract]
Disaggregation of Revenue	The following tables disaggregate the Company's revenue by major source for the three month periods ended March 31, 2021 and 2020 (excluding intercompany sales): Three Months Ended March 31, 2021 (in millions) Infrastructure Materials Total Net Sales-Domestic: Equipment sales $ 99.2 $ 41.8 $ 141.0 Parts and component sales 51.9 17.7 69.6 Service and equipment installation revenue 5.8 0.1 5.9 Used equipment sales 2.9 — 2.9 Freight revenue 5.6 1.5 7.1 Other (0.4) (0.5) (0.9) Total domestic revenue 165.0 60.6 225.6 Net Sales-International: Equipment sales 21.3 12.8 34.1 Parts and component sales 13.1 7.7 20.8 Service and equipment installation revenue 1.0 0.5 1.5 Used equipment sales 0.1 0.8 0.9 Freight revenue 0.8 0.3 1.1 Other 0.2 0.2 0.4 Total international revenue 36.5 22.3 58.8 Total net sales $ 201.5 $ 82.9 $ 284.4 Three Months Ended March 31, 2020 (in millions) Infrastructure Materials Total Net Sales-Domestic: Equipment sales $ 100.4 $ 41.3 $ 141.7 Parts and component sales 52.6 18.5 71.1 Service and equipment installation revenue 6.8 0.4 7.2 Used equipment sales 7.2 — 7.2 Freight revenue 6.0 1.3 7.3 Other (0.2) (0.5) (0.7) Total domestic revenue 172.8 61.0 233.8 Net Sales-International: Equipment sales 19.4 14.4 33.8 Parts and component sales 8.3 9.3 17.6 Service and equipment installation revenue 0.9 0.2 1.1 Used equipment sales 0.6 0.8 1.4 Freight revenue 0.6 0.3 0.9 Other — 0.2 0.2 Total international revenue 29.8 25.2 55.0 Total net sales $ 202.6 $ 86.2 $ 288.8
Revenue from External Customers by Geographic Areas	Sales into major geographic regions were as follows: Three Months Ended March 31, (in millions) 2021 2020 United States $ 225.6 $ 233.8 Canada 17.3 14.7 Europe 10.5 9.4 Australia 8.8 5.8 Africa 8.3 6.6 South America 4.5 4.1 Brazil 4.2 4.7 Other 5.2 9.7 Total foreign 58.8 55.0 Total net sales $ 284.4 $ 288.8

Segment Information (Tables)

Segment Information (Tables)	3 Months Ended
	Mar. 31, 2021
Segment Reporting [Abstract]
Schedule of Segment Reporting Information, by Segment	The accounting policies of the reportable segments are the same as those described in the summary of significant accounting policies. Intersegment sales and transfers between foreign subsidiaries are valued at prices comparable to those for unrelated parties. Segment Information: Three Months Ended March 31, 2021 (in millions) Infrastructure Materials Corporate Total Revenues from external customers $ 201.5 $ 82.9 $ — $ 284.4 Intersegment sales 10.1 12.1 — 22.2 Segment profit (loss) 21.0 6.5 (18.8) 8.7 Three Months Ended March 31, 2020 (in millions) Infrastructure Materials Corporate Total Revenues from external customers $ 202.6 $ 86.2 $ — $ 288.8 Intersegment sales 5.9 8.3 — 14.2 Segment profit (loss) 17.2 6.0 (2.9) 20.3
Reconciliation of Operating Profit (Loss) from Segments to Consolidated	A reconciliation of total segment profit to the Company's consolidated totals is as follows: Three Months Ended March 31, (in millions) 2021 2020 Net income attributable to controlling interest Total profit for reportable segments $ 27.5 $ 23.2 Corporate expenses, net (18.8) (2.9) Net loss attributable to noncontrolling interest — 0.2 Recapture of intersegment profit — 0.1 Total consolidated net income attributable to controlling interest $ 8.7 $ 20.6

Restructuring, Impairment and_2

Restructuring, Impairment and Other Asset Charges, Net (Tables)	3 Months Ended
	Mar. 31, 2021
Restructuring, Settlement and Impairment Provisions [Abstract]
Restructuring and Related Costs	Restructuring and asset impairment charges are presented below: Three Months Ended March 31, (in millions) 2021 2020 Restructuring charges: Costs associated with closing Albuquerque $ — $ 0.3 Costs associated with closing Mequon 0.4 — Costs associated with closing Enid — 0.3 Costs associated with closing Tacoma 0.4 — Workforce reductions at multiple sites — 0.5 Total restructuring related charges 0.8 1.1 Asset impairment charges: Goodwill impairment charges — 1.6 Total asset impairment charges — 1.6 Gain on sale of property and equipment, net: Gain on sale of property and equipment, net (0.1) (0.6) Total gain of sales of property and equipment, net (0.1) (0.6) Restructuring, impairment and other asset charges, net $ 0.7 $ 2.1 Restructuring charges by segment are as follows: Three Months Ended March 31, (in millions) 2021 2020 Infrastructure Solutions $ 0.4 $ 1.1 Materials Solutions 0.4 — Total restructuring related charges $ 0.8 $ 1.1
Schedule of Asset Impairment Charges	Impairment charges by segment are as follows: Three Months Ended March 31, (in millions) 2021 2020 Infrastructure Solutions $ — $ 1.6 Total impairment charges $ — $ 1.6
Schedule of Fixed Asset Sales	The net gain on sale of property and equipment by segment are as follows: Three Months Ended March 31, (in millions) 2021 2020 Infrastructure Solutions $ (0.1) $ (0.6) Total gain on sale of property and equipment, net $ (0.1) $ (0.6)

Earnings Per Common Share (Tabl

Earnings Per Common Share (Tables)	3 Months Ended
	Mar. 31, 2021
Earnings Per Share [Abstract]
Computation of Earnings Per Share	The following table sets forth a reconciliation of the number of shares used in the computation of basic and diluted earnings per common share: Three Months Ended March 31, 2021 2020 Denominator: Denominator for basic earnings per common share 22,633,457 22,544,999 Effect of dilutive securities 241,353 168,137 Denominator for diluted earnings per common share 22,874,810 22,713,136

Significant Accounting Policies

Significant Accounting Policies (Details) $ in Millions	3 Months Ended
	Mar. 31, 2021USD ($)segment	Mar. 31, 2020USD ($)
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Number of reportable segments | segment	2
Total gain of sales of property and equipment, net	$ 0.1	$ 0.6
Software and Software Development Costs
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Production costs, period cost	1.5
Revision of Prior Period, Reclassification, Adjustment | Cost of Sales
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Total gain of sales of property and equipment, net	(0.6)
Revision of Prior Period, Reclassification, Adjustment | Restructuring Charges
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Total gain of sales of property and equipment, net	$ 0.6

Acquisitions - Narrative (Detai

Acquisitions - Narrative (Details) - USD ($) $ in Millions	Aug. 03, 2020	Jul. 20, 2020	Mar. 31, 2021	Dec. 31, 2020
Business Acquisition [Line Items]
Goodwill			$ 38.9	$ 38.7
Con-e-Co
Business Acquisition [Line Items]
Total purchase price		$ 13.8
Intangible assets		$ 4.3
Increase in intangible assets, current			0.4
Con-e-Co | Customer Relationships
Business Acquisition [Line Items]
Acquired finite-lived intangible assets, weighted average useful life		8 years
Con-e-Co | Trade Names
Business Acquisition [Line Items]
Acquired finite-lived intangible assets, weighted average useful life		3 years
BMH Systems
Business Acquisition [Line Items]
Total purchase price	$ 15.6
Intangible assets	5.7
Goodwill	$ 6.3
Goodwill, period decrease			$ 0.1
BMH Systems | Customer Relationships
Business Acquisition [Line Items]
Acquired finite-lived intangible assets, weighted average useful life	9 years
BMH Systems | Trade Names
Business Acquisition [Line Items]
Acquired finite-lived intangible assets, weighted average useful life	15 years

Acquisitions - Con-e-Co Purchas

Acquisitions - Con-e-Co Purchase Price Allocation (Details) - Con-e-Co $ in Millions	Jul. 20, 2020USD ($)
Business Acquisition [Line Items]
Accounts receivable and contract assets	$ 2.3
Inventories	8.1
Other assets	6.6
Intangible assets	4.3
Total assets acquired	21.3
Accounts payable and other	(4.7)
Advance customer deposits	(2.8)
Total liabilities assumed	(7.5)
Total purchase price	$ 13.8

Acquisitions - BMH Systems Purc

Acquisitions - BMH Systems Purchase Price Allocation (Details) - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020	Aug. 03, 2020
Business Acquisition [Line Items]
Goodwill	$ 38.9	$ 38.7
BMH Systems
Business Acquisition [Line Items]
Cash			$ 1.2
Accounts receivable and contract assets			6.4
Inventories			2
Goodwill			6.3
Other assets			3.8
Intangible assets			5.7
Total assets acquired			25.4
Total liabilities assumed			(9.8)
Total purchase price			$ 15.6

Inventories (Details)

Inventories (Details) - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020
Inventory Disclosure [Abstract]
Raw materials and parts	$ 160	$ 154.6
Work-in-process	54.6	57.3
Finished goods	26.8	34
Used equipment	2.8	3.8
Total	$ 244.2	$ 249.7

Fair Value Measurements - Sched

Fair Value Measurements - Schedule of Fair Value, Assets and Liabilities Measure on Recurring Basis (Details) - Fair Value, Recurring - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020
Financial assets:
Derivative financial instruments		$ 0.1
Total financial assets	$ 19.6	18.1
Financial liabilities:
Derivative financial instruments	0.2	0.5
SERP liabilities	8.1	7.3
Total financial liabilities	8.3	7.8
Corporate bonds
Financial assets:
Trading debt securities:	4	4.8
Municipal bonds
Financial assets:
Trading debt securities:	0.6	0.9
Floating rate notes
Financial assets:
Trading debt securities:	0.4	0.4
U.S. government securities
Financial assets:
Trading debt securities:	1.8	1.8
Asset-backed securities
Financial assets:
Trading debt securities:	1.8	2.1
Other
Financial assets:
Trading debt securities:	1.6	1
Preferred stocks
Financial assets:
Trading equity securities:	0.3	0.3
Money Market Funds
Financial assets:
Trading equity securities:	3.8	1.7
Supplemental Employee Retirement Plan | Money Market Funds
Financial assets:
Trading equity securities:	0.2	0.2
Supplemental Employee Retirement Plan | Mutual Fund
Financial assets:
Trading equity securities:	5.1	4.8
Level 1
Financial assets:
Derivative financial instruments		0
Total financial assets	16.3	14
Financial liabilities:
Derivative financial instruments	0	0
SERP liabilities	0	0
Total financial liabilities	0	0
Level 1 | Corporate bonds
Financial assets:
Trading debt securities:	4	4.8
Level 1 | Municipal bonds
Financial assets:
Trading debt securities:	0	0
Level 1 | Floating rate notes
Financial assets:
Trading debt securities:	0.4	0.4
Level 1 | U.S. government securities
Financial assets:
Trading debt securities:	1.8	1.8
Level 1 | Asset-backed securities
Financial assets:
Trading debt securities:	0	0
Level 1 | Other
Financial assets:
Trading debt securities:	0.7	0
Level 1 | Preferred stocks
Financial assets:
Trading equity securities:	0.3	0.3
Level 1 | Money Market Funds
Financial assets:
Trading equity securities:	3.8	1.7
Level 1 | Supplemental Employee Retirement Plan | Money Market Funds
Financial assets:
Trading equity securities:	0.2	0.2
Level 1 | Supplemental Employee Retirement Plan | Mutual Fund
Financial assets:
Trading equity securities:	5.1	4.8
Level 2
Financial assets:
Derivative financial instruments		0.1
Total financial assets	3.3	4.1
Financial liabilities:
Derivative financial instruments	0.2	0.5
SERP liabilities	8.1	7.3
Total financial liabilities	8.3	7.8
Level 2 | Corporate bonds
Financial assets:
Trading debt securities:	0	0
Level 2 | Municipal bonds
Financial assets:
Trading debt securities:	0.6	0.9
Level 2 | Floating rate notes
Financial assets:
Trading debt securities:	0	0
Level 2 | U.S. government securities
Financial assets:
Trading debt securities:	0	0
Level 2 | Asset-backed securities
Financial assets:
Trading debt securities:	1.8	2.1
Level 2 | Other
Financial assets:
Trading debt securities:	0.9	1
Level 2 | Preferred stocks
Financial assets:
Trading equity securities:	0	0
Level 2 | Money Market Funds
Financial assets:
Trading equity securities:	0	0
Level 2 | Supplemental Employee Retirement Plan | Money Market Funds
Financial assets:
Trading equity securities:	0	0
Level 2 | Supplemental Employee Retirement Plan | Mutual Fund
Financial assets:
Trading equity securities:	$ 0	$ 0

Product Warranty Reserves (Deta

Product Warranty Reserves (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Movement in Standard and Extended Product Warranty Accrual, Increase (Decrease) [Roll Forward]
Reserve balance, beginning of the period	$ 10.3	$ 10.3
Warranty liabilities accrued	2.7	2.7
Warranty liabilities settled	(2.1)	(2.1)
Other	0	(0.2)
Reserve balance, end of the period	$ 10.9	$ 10.7
Minimum
Standard Product Warranty Disclosure [Abstract]
Standard Product Warranty Description	three months
Maximum
Standard Product Warranty Disclosure [Abstract]
Standard Product Warranty Description	two years

Accrued Loss Reserves (Details)

Accrued Loss Reserves (Details) - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020
Accrued Loss Reserves [Abstract]
Liability for claims and claims adjustment expense	$ 7.3	$ 7.2
Self insurance reserve, noncurrent	$ 4.9	$ 4.2

Income Taxes (Details)

Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2017	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Effective income tax rate reconciliation, percent	9.40%	(33.30%)	(35.00%)
Income tax benefit, continuing operations, government grants		$ 9.5
Unrecognized tax benefits	$ 9.9			$ 9.7

Commitments and Contingencies (

Commitments and Contingencies (Details) - USD ($) $ in Millions	Aug. 16, 2018	Dec. 31, 2020	Mar. 31, 2021
Loss Contingency [Abstract]
Contractual obligation		$ 2.9	$ 2.6
Percentage of potential contingent liability on unpaid balance		1.75%
Maximum exposure			0.4
Loss contingency accrual		$ 2	1.5
Performance Guarantee
Loss Contingency [Abstract]
Contingent liabilities for letters of credit issued on behalf of foreign subsidiaries			3.7
Astec Brazil
Loss Contingency [Abstract]
Contingent liabilities for letters of credit issued on behalf of foreign subsidiaries			1.6
Letter of Credit Lender
Loss Contingency [Abstract]
Amount of letters of credit outstanding			5.5
Revolving Credit Facility
Loss Contingency [Abstract]
Borrowings outstanding			150
Letter of Credit
Loss Contingency [Abstract]
Line of credit facility, maximum borrowing capacity			30
Pending Litigation
Loss Contingency [Abstract]
Loss contingency, damages sought, value	$ 8.5
Maximum
Loss Contingency [Abstract]
Amount of letters of credit outstanding			$ 8.9

Share-Based Compensation - Narr

Share-Based Compensation - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Apr. 27, 2021
Subsequent Event
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, capital shares reserved for future issuance			1,280,000
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation expense	$ 1.4	$ 1.1

Revenue Recognition (Details)

Revenue Recognition (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Jun. 30, 2020	Mar. 31, 2020
Disaggregation of Revenue [Abstract]
Net sales	$ 284.4	$ 288.8	$ 288.8
United States
Disaggregation of Revenue [Abstract]
Net sales	225.6		233.8
United States | Equipment sales
Disaggregation of Revenue [Abstract]
Net sales	141		141.7
United States | Parts and component sales
Disaggregation of Revenue [Abstract]
Net sales	69.6		71.1
United States | Service and equipment installation revenue
Disaggregation of Revenue [Abstract]
Net sales	5.9		7.2
United States | Used equipment sales
Disaggregation of Revenue [Abstract]
Net sales	2.9		7.2
United States | Freight revenue
Disaggregation of Revenue [Abstract]
Net sales	7.1		7.3
United States | Other
Disaggregation of Revenue [Abstract]
Net sales	(0.9)		(0.7)
Canada
Disaggregation of Revenue [Abstract]
Net sales	17.3		14.7
Europe
Disaggregation of Revenue [Abstract]
Net sales	10.5		9.4
Australia
Disaggregation of Revenue [Abstract]
Net sales	8.8		5.8
Africa
Disaggregation of Revenue [Abstract]
Net sales	8.3		6.6
South America
Disaggregation of Revenue [Abstract]
Net sales	4.5		4.1
Brazil
Disaggregation of Revenue [Abstract]
Net sales	4.2		4.7
International
Disaggregation of Revenue [Abstract]
Net sales	58.8	55	55
International | Equipment sales
Disaggregation of Revenue [Abstract]
Net sales	34.1	33.8	33.8
International | Parts and component sales
Disaggregation of Revenue [Abstract]
Net sales	20.8	17.6	17.6
International | Service and equipment installation revenue
Disaggregation of Revenue [Abstract]
Net sales	1.5	1.1	1.1
International | Used equipment sales
Disaggregation of Revenue [Abstract]
Net sales	0.9	1.4	1.4
International | Freight revenue
Disaggregation of Revenue [Abstract]
Net sales	1.1	0.9	0.9
International | Other
Disaggregation of Revenue [Abstract]
Net sales	0.4	0.2	0.2
Other
Disaggregation of Revenue [Abstract]
Net sales	5.2		9.7
Total foreign
Disaggregation of Revenue [Abstract]
Net sales	58.8		55
Infrastructure Solutions
Disaggregation of Revenue [Abstract]
Net sales	201.5		202.6
Infrastructure Solutions | United States
Disaggregation of Revenue [Abstract]
Net sales	165		172.8
Infrastructure Solutions | United States | Equipment sales
Disaggregation of Revenue [Abstract]
Net sales	99.2		100.4
Infrastructure Solutions | United States | Parts and component sales
Disaggregation of Revenue [Abstract]
Net sales	51.9		52.6
Infrastructure Solutions | United States | Service and equipment installation revenue
Disaggregation of Revenue [Abstract]
Net sales	5.8		6.8
Infrastructure Solutions | United States | Used equipment sales
Disaggregation of Revenue [Abstract]
Net sales	2.9		7.2
Infrastructure Solutions | United States | Freight revenue
Disaggregation of Revenue [Abstract]
Net sales	5.6		6
Infrastructure Solutions | United States | Other
Disaggregation of Revenue [Abstract]
Net sales	(0.4)		(0.2)
Infrastructure Solutions | International
Disaggregation of Revenue [Abstract]
Net sales	36.5	29.8	29.8
Infrastructure Solutions | International | Equipment sales
Disaggregation of Revenue [Abstract]
Net sales	21.3		19.4
Infrastructure Solutions | International | Parts and component sales
Disaggregation of Revenue [Abstract]
Net sales	13.1		8.3
Infrastructure Solutions | International | Service and equipment installation revenue
Disaggregation of Revenue [Abstract]
Net sales	1		0.9
Infrastructure Solutions | International | Used equipment sales
Disaggregation of Revenue [Abstract]
Net sales	0.1		0.6
Infrastructure Solutions | International | Freight revenue
Disaggregation of Revenue [Abstract]
Net sales	0.8		0.6
Infrastructure Solutions | International | Other
Disaggregation of Revenue [Abstract]
Net sales	0.2		0
Materials Solutions
Disaggregation of Revenue [Abstract]
Net sales	82.9		86.2
Materials Solutions | United States
Disaggregation of Revenue [Abstract]
Net sales	60.6		61
Materials Solutions | United States | Equipment sales
Disaggregation of Revenue [Abstract]
Net sales	41.8		41.3
Materials Solutions | United States | Parts and component sales
Disaggregation of Revenue [Abstract]
Net sales	17.7		18.5
Materials Solutions | United States | Service and equipment installation revenue
Disaggregation of Revenue [Abstract]
Net sales	0.1		0.4
Materials Solutions | United States | Used equipment sales
Disaggregation of Revenue [Abstract]
Net sales	0		0
Materials Solutions | United States | Freight revenue
Disaggregation of Revenue [Abstract]
Net sales	1.5		1.3
Materials Solutions | United States | Other
Disaggregation of Revenue [Abstract]
Net sales	(0.5)		(0.5)
Materials Solutions | International
Disaggregation of Revenue [Abstract]
Net sales	22.3	$ 25.2	25.2
Materials Solutions | International | Equipment sales
Disaggregation of Revenue [Abstract]
Net sales	12.8		14.4
Materials Solutions | International | Parts and component sales
Disaggregation of Revenue [Abstract]
Net sales	7.7		9.3
Materials Solutions | International | Service and equipment installation revenue
Disaggregation of Revenue [Abstract]
Net sales	0.5		0.2
Materials Solutions | International | Used equipment sales
Disaggregation of Revenue [Abstract]
Net sales	0.8		0.8
Materials Solutions | International | Freight revenue
Disaggregation of Revenue [Abstract]
Net sales	0.3		0.3
Materials Solutions | International | Other
Disaggregation of Revenue [Abstract]
Net sales	$ 0.2		$ 0.2

Revenue Recognition - Narrative

Revenue Recognition - Narrative (Details) - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020
Disaggregation of Revenue [Line Items]
Contract assets	$ 4.3	$ 4.3
Contract with Customer, Liability	8.3	8.9
Extended Warranty Revenue
Disaggregation of Revenue [Line Items]
Deferred revenue	$ 2.7	$ 2.9

Segment Information- Narrative

Segment Information- Narrative (Details)	3 Months Ended
	Mar. 31, 2021segmentbusiness
Segment Reporting Information [Line Items]
Number of reportable segments | segment	2
Infrastructure Solutions
Segment Reporting Information [Line Items]
Number of business units	15
Materials Solutions
Segment Reporting Information [Line Items]
Number of business units	10

Segment Information - Segment I

Segment Information - Segment Information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Jun. 30, 2020	Mar. 31, 2020
Segment Reporting, Disclosure of Entity's Reportable Segments [Abstract]
Net sales	$ 284.4	$ 288.8	$ 288.8
Segment profit (loss)	8.7		20.6
Infrastructure Solutions
Segment Reporting, Disclosure of Entity's Reportable Segments [Abstract]
Net sales	201.5		202.6
Materials Solutions
Segment Reporting, Disclosure of Entity's Reportable Segments [Abstract]
Net sales	82.9		86.2
Corporate
Segment Reporting, Disclosure of Entity's Reportable Segments [Abstract]
Net sales			0
Segment profit (loss)			(2.9)
Operating Segments
Segment Reporting, Disclosure of Entity's Reportable Segments [Abstract]
Net sales	284.4		288.8
Segment profit (loss)	8.7		20.3
Operating Segments | Infrastructure Solutions
Segment Reporting, Disclosure of Entity's Reportable Segments [Abstract]
Net sales	201.5		202.6
Segment profit (loss)	21		17.2
Operating Segments | Materials Solutions
Segment Reporting, Disclosure of Entity's Reportable Segments [Abstract]
Net sales	82.9		86.2
Segment profit (loss)	6.5		6
Operating Segments | Corporate
Segment Reporting, Disclosure of Entity's Reportable Segments [Abstract]
Net sales	0
Segment profit (loss)	(18.8)
Intersegment Eliminations
Segment Reporting, Disclosure of Entity's Reportable Segments [Abstract]
Net sales	22.2		14.2
Intersegment Eliminations | Infrastructure Solutions
Segment Reporting, Disclosure of Entity's Reportable Segments [Abstract]
Net sales	10.1		5.9
Intersegment Eliminations | Materials Solutions
Segment Reporting, Disclosure of Entity's Reportable Segments [Abstract]
Net sales	12.1		8.3
Intersegment Eliminations | Corporate
Segment Reporting, Disclosure of Entity's Reportable Segments [Abstract]
Net sales	$ 0		$ 0

Segment Information - Reconcili

Segment Information - Reconciliation of Total Segment Profits to Consolidated Totals (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Segment Reconciliation [Abstract]
Net income	$ 8.7	$ 20.4
Net loss attributable to noncontrolling interest	0	0.2
Net income attributable to controlling interest	8.7	20.6
Operating Segments
Segment Reconciliation [Abstract]
Net income	27.5	23.2
Net income attributable to controlling interest	8.7	20.3
Intersegment Eliminations
Segment Reconciliation [Abstract]
Net income	0	0.1
Corporate, Non-Segment
Segment Reconciliation [Abstract]
Net income	$ (18.8)	$ (2.9)

Restructuring, Impairment and_3

Restructuring, Impairment and Other Asset Charges, Net (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Restructuring Cost and Reserve [Line Items]
Workforce reductions at multiple sites	$ 0	$ 0.5
Total restructuring related charges	0.8	1.1
Asset Impairment Charges [Abstract]
Goodwill impairment charges	0	1.6
Total asset impairment charges	0	1.6
Gain (Loss) on Disposition of Assets [Abstract]
Gain on sale of property and equipment, net	(0.1)	(0.6)
Total gain of sales of property and equipment, net	(0.1)	(0.6)
Restructuring, impairment and other asset charges, net	0.7	2.1
Facility Closing | Albuquerque Exit Plan
Restructuring Cost and Reserve [Line Items]
Business exit costs	0	0.3
Facility Closing | Mequon Exit Plan
Restructuring Cost and Reserve [Line Items]
Business exit costs	0.4	0
Facility Closing | Enid Exit Plan
Restructuring Cost and Reserve [Line Items]
Business exit costs	0	0.3
Facility Closing | Tacoma Exit Plan
Restructuring Cost and Reserve [Line Items]
Business exit costs	$ 0.4	$ 0

Restructuring, Impairment and_4

Restructuring, Impairment and Other Asset Charges, Net - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Restructuring Cost and Reserve [Line Items]
Restructuring reserve	$ 1.4		$ 1.1
Assets held for sale	5.1		6.3
Workforce reductions at multiple sites	0	$ 0.5
Goodwill impairment charges	0	1.6
Disposal group, including discontinued operation, consideration	6.9
Disposal group, accounts payable, current	1.1
Facility Closing | Enid Exit Plan
Restructuring Cost and Reserve [Line Items]
Business exit costs	0	0.3
Facility Closing | Enid Exit Plan | Astec Mobile Machinery GmbH
Restructuring Cost and Reserve [Line Items]
Assets held for sale			$ 5.1
Facility Closing | Mequon Exit Plan
Restructuring Cost and Reserve [Line Items]
Business exit costs	0.4	0
Facility Closing | Tacoma Exit Plan
Restructuring Cost and Reserve [Line Items]
Business exit costs	$ 0.4	$ 0

Restructuring, Impairment and_5

Restructuring, Impairment and Other Asset Charges, Net - Restructuring Charge by Segment (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Restructuring Cost and Reserve [Line Items]
Total restructuring related charges	$ 0.8	$ 1.1
Infrastructure Solutions
Restructuring Cost and Reserve [Line Items]
Total restructuring related charges	0.4	1.1
Materials Solutions
Restructuring Cost and Reserve [Line Items]
Total restructuring related charges	$ 0.4	$ 0

Restructuring, Impairment and_6

Restructuring, Impairment and Other Asset Charges, Net - Impairment Charges by Segment (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Restructuring Cost and Reserve [Line Items]
Total asset impairment charges	$ 0	$ 1.6
Infrastructure Solutions
Restructuring Cost and Reserve [Line Items]
Total asset impairment charges	$ 0	$ 1.6

Restructuring, Impairment and_7

Restructuring, Impairment and Other Asset Charges, Net - Sale of Fixed Assets by Segment (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Restructuring Cost and Reserve [Line Items]
Gain on sale of property and equipment, net	$ (0.1)	$ (0.6)
Infrastructure Solutions
Restructuring Cost and Reserve [Line Items]
Gain on sale of property and equipment, net	$ (0.1)	$ (0.6)

Earnings Per Common Share (Deta

Earnings Per Common Share (Details) - shares	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Denominator:
Denominator for basic earnings per common share	22,633,457	22,544,999
Effect of dilutive securities	241,353	168,137
Denominator for diluted earnings per common share	22,874,810	22,713,136